Determination of Bottom-Hole Pressure Considering Gas-Liquid Hydrodynamics Based on Wellhead Information

This study presents a novel method for analyzing two-phase fluid flow in pipelines using a mathematical model. By establishing a relationship between mass gas content and spin gas content from experimental data, key parameters of the liquid-gas two-phase system were de‎rived. The method enables the determination of the main parameters of flowing wells and the estimation of bottom-hole pressure. Validation against ‎measured data demonstrates the method's accuracy and practical applicability in industrial settings. The findings contribute to enhancing ‎extraction efficiency and optimizing production processes in oil and gas operations. The proposed method addresses the limitations of exist‎ing models that neglect the coupling effect of spin gas content and mass transfer, which is critical in high-productivity wells. Through systematic wellhead pressure measurements and mathematical models, this study provides a reliable alternative to directly measuring bottom-hole pressure using deep-well pressure gauges, which often present technical challenges and increased measurement errors with increasing well depth. ‎The method is particularly effective in high-productivity wells and efficiently developed reservoirs, offering significant theoretical support ‎for further advancements in petroleum engineering. The results of this research are based on laboratory experiments, theoretical studies, and ‎industrial field observations, ensuring the robustness and applicability of the proposed method in real-world scenarios‎.